End turn arrangement

• US 8,629,596 B2
• Filed: 05/17/2010
• Issued: 01/14/2014
• Est. Priority Date: 07/13/2009
• Status: Active Grant

• Current Assignee: Flender GmbH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Junge, Martin, Germishuizen, Johannes, Grning, Arne
• Primary Examiner(s): Nguyen, Tran
• Assistant Examiner(s): PHAM, LEDA T
• Application Number:
  US13/147,002
• Publication Number:
  US 20110291423A1
• Time in Patent Office: 1,338 Days
• Field of Search: 310/198, 310/195, 310/208, 310/270, 310/260, 29596-598
• US Class Current: 310/208
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 15/0037 Shaping or compacting winding heads H02K15/005, H02K15/0087 and H02K15/0428 take precedence
• CPC Class Codes: H02K 2213/12 Machines characterised by the modularity of some components
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 7/1838 Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine

Abstract

The invention relates to an end turn arrangement in a stator of a dynamoelectric machine. In order to reduce, in a simple fashion, the volume required for the end turns of the form-wound coils, the stator is formed of segments (1) that have a substantially circular arc-shaped cross-section and can be combined into a stator by adding one or more other segments (1) having the same design. Each segment (1) has recesses (6, 7), within which at least one first form-wound coil (3), which is bent outward in the radial direction of the stator in the region of the end turns, and at least one second form-wound coil (4), which is bent inward in the radial direction of the stator in the region of the end turns, are arranged in the form of a tiered winding.

Claims

1. A segment for a ring-shaped stator of a dynamoelectric machine, said segment having a substantially circular arc-shaped cross section and constructed for attachment to other said segments to form a stator, said segment having slots and comprising:

at least one first form-wound coil arranged in the slots and bent outwards in a radial direction of the stator in a region of end turns; and

at least one second form-wound coil arranged in the slots and bent inwards in the radial direction of the stator in the region of the end turns,

wherein the first and second form-wound coils are arranged in the form of a tiered winding, and

wherein the first and second form-wound coils are same design and laid in the slots in opposite directions.

2. The segment of claim 1, further comprising at least one third non-bent form-wound coil which is arranged between the first and the second form-wound coils.

3. The segment of claim 1, wherein each of the first and second form coils has a feed conductor and a return conductor, said feed conductor being arranged in a first one of the slots having slot flanks which are aligned parallel to slot flanks of a second one of the slots in which the return conductor is arranged.

4. The segment of claim 1, wherein the slots point inwards as viewed in the radial direction of the stator.

5. The segment of claim 1, wherein the slots point outwards as viewed in the radial direction of the stator.

6. A ring-shaped stator, comprising at least two segments, each said segment having a substantially circular arc-shaped cross section and having slots for arrangement of at least one first form-wound coil which is bent outwards in a radial direction of the stator in a region of end turns, and at least one second form-wound coil which is bent inwards in the radial direction of the stator in the region of the end turns, wherein the first and second form-wound coils are arranged in the form of a tiered winding, and wherein the first and second form-wound coils are same design and laid in the slots in opposite directions.

7. The stator of claim 6, wherein the segment includes at least one third non-bent form-wound coil which is arranged between the first and the second form-wound coils.

8. The stator of claim 6, wherein each of the first and second form coils has a feed conductor and a return conductor, said feed conductor being arranged in a first one of the slots having slot flanks which are aligned parallel to slot flanks of a second one of the slots in which the return conductor is arranged.

9. The stator of claim 6, wherein the slots point inwards as viewed in the radial direction of the stator.

10. The stator of claim 6, wherein the slots point outwards as viewed in the radial direction of the stator.

11. An electrical machine, comprising a ring-shaped stator which includes at least two segments, each said segment having a substantially circular arc-shaped cross section and having slots for arrangement of at least one first form-wound coil which is bent outwards in a radial direction of the stator in a region of end turns, and at least one second form-wound coil which is bent inwards in the radial direction of the stator in the region of the end turns, wherein the first and second form-wound coils are arranged in the form of a tiered winding, and wherein the first and second form-wound coils are of same design and laid in the slots in opposite directions.

12. The electric machine of claim 11, constructed in the form of a wind power generator.

13. A wind turbine, comprising an electrical machine which includes a ring-shaped stator having at least two segments, each said segment having a substantially circular arc-shaped cross section and having slots for arrangement of at least one first form-wound coil which is bent outwards in a radial direction of the stator in a region of end turns, and at least one second form-wound coil which is bent inwards in the radial direction of the stator in the region of the end turns, wherein the first and second form-wound coils are arranged in the form of a tiered winding, and wherein the first and second form-wound coils are same design and laid in the slots in opposite directions.